25W amplifier circuit TDA1521A ----- TDA1521 Power Amplifier

Keywords: minimal external components 25W amplifier circuit TDA1521A With hi-fi amplifier IC TDA1521A produced amplifier circuit having fewer external components, no debugging, a ring mounted on the characteristics. Suitable for homemade, used in part-time relief, or is used to transform the low-grade computer active speakers. TDA1521A using nine-pin single in-line plastic package having an output power, two-channel gain is small, no impact sound speaker switch reliable thermal overload and short circuit protection features. TDA1521A both of positive and negative power supply, a single power supply can also be used, each circuit schematic shown in Figure 1 (a), (b) (here to download diagram). When the dual power supply is powered, two audio output capacitors can be saved, and the high and low sound quality is better. When the single power supply is powered, the power filter capacitor should be as close as possible to the power supply of the integrated circuit to avoid self-exchancing of the circuit. When making it, you must put a heat sink to the integrated block to energize the audio, otherwise it is easy to damage the integrated block. Heat dissipation plate is not less than 200 × 100 × 2mm3.

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